diff options
| -rw-r--r-- | drivers/net/usb/qmi_wwan.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c index fe3be504d84..3b6e932890b 100644 --- a/drivers/net/usb/qmi_wwan.c +++ b/drivers/net/usb/qmi_wwan.c @@ -175,6 +175,9 @@ err: return status; } +/* default ethernet address used by the modem */ +static const u8 default_modem_addr[ETH_ALEN] = {0x02, 0x50, 0xf3}; + /* Make up an ethernet header if the packet doesn't have one. * * A firmware bug common among several devices cause them to send raw @@ -342,6 +345,12 @@ static int qmi_wwan_bind_shared(struct usbnet *dev, struct usb_interface *intf) /* save subdriver struct for suspend/resume wrappers */ dev->data[0] = (unsigned long)subdriver; + /* Never use the same address on both ends of the link, even + * if the buggy firmware told us to. + */ + if (!compare_ether_addr(dev->net->dev_addr, default_modem_addr)) + eth_hw_addr_random(dev->net); + /* make MAC addr easily distinguishable from an IP header */ if (possibly_iphdr(dev->net->dev_addr)) { dev->net->dev_addr[0] |= 0x02; /* set local assignment bit */ |